<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addnewtodo="addnewtodo" />
      <List
        :todoList="todoList"
        :singeCheckedHandle="singeCheckedHandle"
        :singledeleteHandle="singledeleteHandle"
      />
      <Footer 
      :todoList="todoList" 
      :checkAllHandle="checkAllHandle" 
      :deleteAllHandle="deleteAllHandle"
      />
    </div>
  </div>
</template>
<script>

import { v4 as uuidv4 } from "uuid";
import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";
export default {
  name: "App",
  data() {
    return {
      todoList: [],
    };
  },
  methods: {
    //1.添加一个todoList
    addnewtodo(value) {
      this.todoList.unshift(value);
    },
    //2.单个点击多选框逻辑
    singeCheckedHandle(id) {
      this.todoList = this.todoList.map((item) => {
        return item.id === id ? { ...item, done: !item.done } : item;
      });
    },
    //3.删除某个多选框逻辑
    singledeleteHandle(id) {
      const isDelete = confirm("是否确定要删除");
      if (!isDelete) return;
      this.todoList = this.todoList.filter((item) => {
        return item.id !== id;
      });
    },
    //4.点击多选框,根据多选框的checked的值修改todoList的done的值
    checkAllHandle(e) {
      // console.log(e, "App中的e");
     this.todoList = this.todoList.map(item=>{
        return {...item,done:e}
      })
    },
    //5.点击清除已完成任务,把所有done为false的元素删除
    deleteAllHandle(){
      this.todoList = this.todoList.filter(item=> !item.done)
    }
  },
  components: {
    Header,
    List,
    Footer,
  },
  mounted() {
    this.todoList = JSON.parse(localStorage.getItem('todoList')||'[]')
    
  },
  watch:{
    todoList:{
      deep:true,
      handler(){
        localStorage.setItem('todoList',JSON.stringify(this.todoList))
      }
    }
  }
};
</script>

<style >
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>